From c76655c98bc19acd2a7a023d23bb23564f5fa777 Mon Sep 17 00:00:00 2001
From: Dries Buytaert <dries@buytaert.net>
Date: Wed, 24 Nov 2010 16:47:44 +0000
Subject: - Patch #794936 by c960657, amateescu: system_rebuild_module_data()
 called twice on admin/build/modules.

---
 modules/system/system.module | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

(limited to 'modules/system')

diff --git a/modules/system/system.module b/modules/system/system.module
index 98df4868b..13aa1c06c 100644
--- a/modules/system/system.module
+++ b/modules/system/system.module
@@ -2361,12 +2361,19 @@ function _system_rebuild_module_data() {
  *   Array of all available modules and their data.
  */
 function system_rebuild_module_data() {
-  $modules = _system_rebuild_module_data();
-  ksort($modules);
-  system_get_files_database($modules, 'module');
-  system_update_files_database($modules, 'module');
-  $modules = _module_build_dependencies($modules);
-  return $modules;
+  $modules_cache = &drupal_static(__FUNCTION__);
+  // Only rebuild once per request. $modules and $modules_cache cannot be
+  // combined into one variable, because the $modules_cache variable is reset by
+  // reference from system_list_reset() during the rebuild.
+  if (!isset($modules_cache)) {
+    $modules = _system_rebuild_module_data();
+    ksort($modules);
+    system_get_files_database($modules, 'module');
+    system_update_files_database($modules, 'module');
+    $modules = _module_build_dependencies($modules);
+    $modules_cache = $modules;
+  }
+  return $modules_cache;
 }
 
 /**
-- 
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